Implemented curl support for web requests

check_curl.py

Index: check_curl.py
===================================================================
new file mode 100644
--- /dev/null
+++ b/check_curl.py
@@ -0,0 +1,30 @@
+#!/usr/bin/env python
+# coding: utf-8
+
+import os, sys, subprocess, tempfile;
+baseDir = os.path.abspath(os.path.dirname(__file__))
+
+def check_curl():
+  (fd, name) = tempfile.mkstemp(dir=os.path.join(baseDir, 'build'), suffix='.h')
+  try:
+    handle = os.fdopen(fd, 'wb');
+    handle.write('#include <curl/curl.h>')
+    handle.close();
+
+    # This command won't work for Windows or Android build environments but we
+    # don't want to use curl there anyway
+    command = ['/usr/bin/env', 'gcc', '-E', name];
+    process = subprocess.Popen(command, stdout=subprocess.PIPE, stderr=subprocess.PIPE)
+    process.communicate()
+
+    if process.returncode:
+      # call failed, curl not available
+      sys.stdout.write('0')
+    else:
+      # call succeeded, curl can be used
+      sys.stdout.write('1')
+  finally:
+    os.remove(name)
+
+if __name__ == '__main__':
+  check_curl()